linux-kernel - Re: [PATCH] cgroup: avoid cgroup root name longer than max

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 11 Dec 2017 07:12:34 -0800
From:   Tejun Heo <tj@...nel.org>
To:     Ma Shimiao <mashimiao.fnst@...fujitsu.com>
Cc:     lizefan@...wei.com, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroup: avoid cgroup root name longer than max

On Fri, Dec 08, 2017 at 04:47:46PM +0800, Ma Shimiao wrote:
> cgroup root name has max length limit, we should avoid copying
> longer name than that to the name.
> 
> Signed-off-by: Ma Shimiao <mashimiao.fnst@...fujitsu.com>
> ---
>  kernel/cgroup/cgroup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
> index 0b1ffe147f24..3614a21ad6b8 100644
> --- a/kernel/cgroup/cgroup.c
> +++ b/kernel/cgroup/cgroup.c
> @@ -1866,7 +1866,7 @@ void init_cgroup_root(struct cgroup_root *root, struct cgroup_sb_opts *opts)
>  	if (opts->release_agent)
>  		strcpy(root->release_agent_path, opts->release_agent);
>  	if (opts->name)
> -		strcpy(root->name, opts->name);
> +		strncpy(root->name, opts->name, MAX_CGROUP_ROOT_NAMELEN);

Ditto here, let's use strscpy().

Thanks.

-- 
tejun